Once again I take no credit for this but unfortunately I can't remember where I picked up this brilliant idea.
Somewhere on FB I read an afterthought comment "Thank goodness for freezer clips". That was it, but I gave it a bit of though and now I use freezer clips as choke ties when warping. I use small ones at the cross end and then bigger ones on the chain itself. It has saved me a lot of time. Just make sure they are well and truly closed.